#include "cmd_parser.h"
#include <string.h>

void cmd_parser_init(cmd_parser_t *parser)
{
    parser->count = 0;
}

int cmd_parser_register(cmd_parser_t *parser, const char *name, cmd_handler_t handler)
{
    size_t i;

    if (parser->count >= CMD_PARSER_MAX_CMDS) return -1;

    i = strlen(name);
    if (i >= CMD_PARSER_NAME_LEN) i = CMD_PARSER_NAME_LEN - 1;
    memcpy(parser->entries[parser->count].name, name, i);
    parser->entries[parser->count].name[i] = '\0';
    parser->entries[parser->count].handler = handler;
    parser->count++;
    return 0;
}

int cmd_parser_dispatch(cmd_parser_t *parser, char *buf, void *ctx)
{
    char *argv[CMD_PARSER_MAX_ARGS];
    int argc = 0;
    int i;
    char *p = buf;

    while (*p) {
        while (*p == ' ') p++;
        if (*p == '\0') break;

        argv[argc++] = p;
        if (argc >= CMD_PARSER_MAX_ARGS) break;

        while (*p && *p != ' ') p++;
        if (*p) *p++ = '\0';
    }

    if (argc == 0) return -1;

    for (i = 0; i < parser->count; i++) {
        if (strcmp(argv[0], parser->entries[i].name) == 0) {
            return parser->entries[i].handler(ctx, argc, argv);
        }
    }

    return -1;
}